Hi Greg, On Monday 03 May 2010 19:15:48 Greg KH wrote: > On Mon, May 03, 2010 at 02:29:57PM +0200, Laurent Pinchart wrote: > > On Monday 03 May 2010 13:14:11 Viral Mehta wrote: > > > Hi, > > > > > > >This USB video class function driver implements a video capture device > > > >from the host's point of view. It creates a V4L2 output device on the > > > >gadget's side to transfer data from a userspace application over USB. > > > > > > > >The UVC-specific descriptors are passed by the gadget driver to the > > > >UVC function driver, making them completely configurable without any > > > >modification to the function's driver code. > > > > > > I wanted to test this code. I git cloned[1] tree. It has > > > v4l2-event.[c,h] and so I assume that now this tree has support for > > > v4l2 event code. > > > > > > But, while compilation, I am getting this error. > > > [root@viral linux-next]# make uImage > /dev/null && make modules > > > > > > CHK include/linux/version.h > > > CHK include/generated/utsrelease.h > > > > > > make[1]: `include/generated/mach-types.h' is up to date. > > > > > > CALL scripts/checksyscalls.sh > > > Building modules, stage 2. > > > MODPOST 5 modules > > > > > > ERROR: "v4l2_event_dequeue" [drivers/usb/gadget/g_webcam.ko] undefined! > > > ERROR: "v4l2_event_init" [drivers/usb/gadget/g_webcam.ko] undefined! > > > make[1]: *** [__modpost] Error 1 > > > make: *** [modules] Error 2 > > > > > > And by looking at the code, those symbols are not exported and thus the > > > error is obvious. Can you please point me out where to take v4l2-event > > > code? I tried to look for on linuxtv.org but was not able to locate the > > > right code. > > > > > > [1]git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-next.git > > > > There's a patch pending on the linux-media list to export those two > > functions. It has been acked by Sakari (the author of the V4L2 events > > patch set), but not committed by Mauro to his linux-next yet. That > > should be a matter of days. > > Do you have a pointer to that patch? I'll take it into my usb tree for > now, to keep things building, and let Mauro send it to Linus for > merging. Sure https://patchwork.kernel.org/patch/96373/ But please note it requires the V4L2 events patch set from Mauro's linux-next tree. -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
